基于刚柔指标的高层钢框架抗震韧性评估  

EARTHQUAKE RESILIENCE EVALUATION OF HIGH-RISE STEEL FRAME STRUCTURES BASED ON THE STIFFNESSFLEXIBILITY INDICATOR

作　　者：陈寅圳 贾明明[1,2,3] 吕大刚[1,2,3] CHEN Yin-zhen;JIA Ming-ming;LYU Da-gang(School of Civil Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin,Heilongjiang 150090,China;Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin,Heilongjiang 150090,China)

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [2]哈尔滨工业大学土木工程智能防灾减灾工业和信息化部重点实验室,黑龙江哈尔滨150090 [3]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,黑龙江哈尔滨150090

出　　处：《工程力学》2023年第S01期92-97,119,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51978220);国家重点研发计划“政府间国际科技创新合作/港澳台科技创新合作”重点专项项目(2019YFE0112400)。

摘　　要：不同建筑物具有不同的固有动力特性,结合建筑物的结构高度和基本周期可表示为结构刚柔指标,结构的刚柔属性会使得建筑物的震时位移响应和加速度响应不同,进而出现了震后损失情况的差异。以偏刚性钢框架(RF)和偏柔性钢框架(FF)各一栋为研究对象,基于设防地震和罕遇地震作用下的弹塑性时程分析结果和由建筑信息模型得到的构件易损性数据,按照我国《建筑抗震韧性评价标准》(GB/T 38591−2020)对高层钢框架结构进行抗震韧性评估。RF和FF的评估结果显示:RF的层间位移角响应更小、楼面加速度响应更大,FF的响应则相反,说明各类结构构件和非结构构件的修复费用比例、修复时间以及造成的人员损失与结构刚柔指标有关。The inherent dynamic characteristics of different buildings vary a lot.The structural stiffnessflexibility indicator is expressed by the structural height and fundamental period of buildings.The stiffness and flexible properties of the structures will make the seismic displacement response and acceleration response of the buildings different,resulting in different post-earthquake losses.The rigid frame(RF)and the flexible frame(FF)designed according to the current codes are studied.In accordance with the seismic resilience evaluation standard of China,the seismic resilience evaluation of the high-rise steel frame structures is conducted based on the elastoplastic time history analysis under the action of fortification earthquake and rare earthquake and the component fragility obtained from the building information model.The results show that the response of inter-story drift of RF is smaller and the response of floor acceleration is larger,while the response of FF is the opposite.This shows that the proportion of costs and time of repairmen,as well as personnel losses of various structural and nonstructural components,are related to the structural stiffness-flexibility indicator.

关 键 词：结构工程 抗震韧性 结构刚柔指标 高层钢框架结构 弹塑性时程分析 

分 类 号：TU973.31[建筑科学—结构工程] TU973.13